Interchangeable artificial teeth and associated parts



May 29, 1934. E. H. EHLERS 1,961,033

INTERCHANGEABLE ARTIFICIAL TEETH AND ASSQCIATED PARTS Filed March 21, 1931 (3% l EH er BY M6130.

ATTORNEYS UNITED SATE S PATENT OFFICE INTERCHANGEABLE ARTIFICIAL TEETH AND ASSOGIATED PARTS Enrique Holtmann Ehlers, Madrid, Spain Application March 21, 1931, Serial No. 524,358 In Spain December 15, 1930 4 Claims. (01. 32--9) This invention relates to improvements in ar- Which hold the heads of the pins and also the tificial interchangeable pin teeth and associated tooth. plate. As shown in Figs. 1, 2 and 4, in teeth other than One of the objects of the invention is to promolars, the groove 2 extends in the direction of 5 vide an artificial interchangeable pin tooth which the longitudinal axis of the tooth. As shown in 60 1 can be readily replaced when broken. Fig. 5, in molar teeth the groove 2 extends at a A further object of the invention is to provide steep inclination to the axis of the tooth. an artificial interchangeable pin tooth and as- Once the main Work of pp y the tooth to sociated metal plate which is simple in constructh p at is mp t d, e t 9 is us d t j in 10 1-,1 d can b easily joined a d fixed t th them together. The cement also closes the space 65 metal plate without the necessity of soldering yet between the 600th and the plate a d fills t e insure a strong anchoring of the tooth. Space around the p The invention also includes improvements in It Will thus be Seen that, by y invention, I the details of construction and arrangements of have provided an artificial te wh c will have parts which will be hereinafter referred to and all the advantages of interchangeable teeth and 70 .I

particularly pointed out in the claims. Which Will also be as Strongly u ted as 11 In the accompanying drawing; removable teeth. Further, teeth made accord- Figure l is a vertical section of my improved ing this invention n be used either with tooth and associated plate, gold or rubber prothesis. Further, since the plate 1 Figure 2 i a, horizontal ti of Fi 1 th structure is the same for front and molar teeth, 75

section being taken at the level of pin 3A the same make of plate can be used for both kinds Figure 3 i a, d t il View of t Supporting plate of teeth, which is not possible with interchangelooking from the front. able teeth as used heretofore. It will thus be ap- Figure 4 is a detail view of the artificial pin parent that the manner of making teeth accordt t looking from t rear ing to this invention constitutes a substantial Figure 5 is a Vertical Section of my improved simplification and advance with respect to existmolar tooth and associated plate. mg structures- The m reference characters refer to like In the construction illustrated, two doubleparts in an the figures headed pins 3A and 3B of difierent lengths are 30 W In the drawing, 1 denotes the porcelain of the Show? arranged one above the other and when tooth, said porcelain being formed with a groove aszmetedtlth the the.heads of E pms 2 which is disposed in a central vertical plane in W111 be posltloned f Yarymg dlstan.ces Whhm the the rear of the tooth and which has a closing face t confined wlthm the.concavlty of p at its bottom end. The double-headed pins are non By such. Constructwl? the .tooth will be 35 denoted by BA and 33 While the metal plate is aniply supported throughout its major portion. 9

denoted by l. A small plate 5, which is soldered 0 mm: to the rear side of the plate 4, covers the pins An a-rtlficlal tooth havlpg groove m 3A--3l3. Another small plate 6, also soldered to ggg gigg ifig i fifigg igi gfgigs gg :33

h E F l e y g are at iht tai fiiie ifiati iieihtti t r We a head, a m r parts 4, 5 and 6 constitute the plate as a whole gagmg the-back of the Sam plate havmg an The numeral 7 in Figs. 1, 3 and 5 denotes a bevel upset portmn extendmg Into the groove and havformed in the plate to facilitate fitting of the 5 i 21122312235323 figgfigg 255 15,;

tooth to the plate, such fitting entailing a sliding and around the upset portion 0* movement of the tooth in the direction of the An rtificialpm tooth haeing a groovein the 10 v arrow in Fig. 1, and also to facilitate removal of back thereof, a pin embedded in th t t and the tooth from the plateprojecting from the groove, the projecting end of p e 4 hes it D 3 fermlng a the pin having a head, a supporting plate engag- 50 vemty at t e ro t of th p a a d a concavity ing the back of the tooth, said plate having an at the back, said concavity aiiording a receptacle upset portion extending into the groove and havior the head of each pin. The portion 3 has a ing an entrance for the pin head, a filler in the longltudlnal slot through which both pins pass. groove around the projecting pin and head and From Figs. 2 and 3 it will be clear that the poraround the upset portion, and a covering member 1 tion 8 has the appearance of two small wings, attached to said plate, confining the filler and 1,10.

concealing both the upset portion and. said head.

3. An artificial pin tooth having a groove in the back thereof, a headed pin embedded in the tooth and having its headed portion projecting from the groove, a supporting plate in contact with the back of the tooth, said plate having an upset portion extending into the groove, said upset portion having an entrance for the head of the pin and a slot for the pin, a filler, and covering means secured to the supporting plate, completely concealing the filler and keeping it firmly impounded in the groove around the pin and head and around said upset portion.

4. An interchangeable tooth having two headed pins of which one is longer than the other, and means for lodging the pins in the tooth, said tooth having a narrow groove in the rear thereof, a metal plate having a slot and two small in clined wings, said wings extending into said groove, a small plate attached to the metal plate over the slot therein and having a bevelled section, said slot and the space between the plate and the inclined wings defining a T-shaped slot in cross section, said bevelled section allowing the passing of the pin heads into the T-shaped slot.

ENRIQUE HOLTMANN EHLERS. 

